Extubation readiness of the enrolled infants will be determined solely by and at the discretion of the medical team. All enrolled infants will be checked to re-confirm eligibility prior to extubation. Those enrolled infants who are ventilated on EMV (endotracheal mechanical ventilation) with an airway pressure of 8-11 cm H2O at the time when they are deemed extubation-ready by the team will be eligible for randomization. Once eligibility for randomization is assessed, the study coordinator will notify the research team who will immediately perform a bedside functional echocardiography to assess cardiac output and PDA (patent ductus arteriosus) status. In addition, the lung compliance (as measured by the ventilator) will be recorded. If a PDA exists and is found to be hemodynamically significant, then the infant meets one of the exclusion criteria and will be ineligible for randomization.